diff options
Diffstat (limited to 'moon-abe/pbc-0.5.14/arith/naivefp.c')
-rw-r--r-- | moon-abe/pbc-0.5.14/arith/naivefp.c | 270 |
1 files changed, 0 insertions, 270 deletions
diff --git a/moon-abe/pbc-0.5.14/arith/naivefp.c b/moon-abe/pbc-0.5.14/arith/naivefp.c deleted file mode 100644 index ceb1b7fb..00000000 --- a/moon-abe/pbc-0.5.14/arith/naivefp.c +++ /dev/null @@ -1,270 +0,0 @@ -// Naive implementation of F_p. -// Little more than wrappers around GMP mpz functions. - -#include <stdarg.h> -#include <stdio.h> -#include <stdint.h> // for intptr_t -#include <stdlib.h> -#include <string.h> -#include <gmp.h> -#include "pbc_utils.h" -#include "pbc_field.h" -#include "pbc_random.h" -#include "pbc_fp.h" -#include "pbc_memory.h" - -static void zp_init(element_ptr e) { - e->data = pbc_malloc(sizeof(mpz_t)); - mpz_init(e->data); -} - -static void zp_clear(element_ptr e) { - mpz_clear(e->data); - pbc_free(e->data); -} - -static void zp_set_si(element_ptr e, signed long int op) { - mpz_set_si(e->data, op); - mpz_mod(e->data, e->data, e->field->order); -} - -static void zp_set_mpz(element_ptr e, mpz_ptr z) { - mpz_set(e->data, z); - mpz_mod(e->data, e->data, e->field->order); -} - -static void zp_set0(element_ptr e) { - mpz_set_si(e->data, 0); -} - -static void zp_set1(element_ptr e) { - mpz_set_si(e->data, 1); -} - -static size_t zp_out_str(FILE * stream, int base, element_ptr e) { - return mpz_out_str(stream, base, e->data); -} - -static int zp_snprint(char *s, size_t n, element_ptr e) { - return gmp_snprintf(s, n, "%Zd", e->data); -} - -static int zp_set_str(element_ptr e, const char *s, int base) { - int result = pbc_mpz_set_str(e->data, s, base); - mpz_mod(e->data, e->data, e->field->order); - return result; -} - -static int zp_sgn_odd(element_ptr a) { - mpz_ptr z = a->data; - - return mpz_is0(z) ? 0 : (mpz_odd_p(z) ? 1 : -1); -} - -static int zp_sgn_even(element_ptr a) { - mpz_t z; - mpz_init(z); - int res; - - if (mpz_is0(a->data)) { - res = 0; - } else { - mpz_add(z, a->data, a->data); - res = mpz_cmp(z, a->field->order); - } - mpz_clear(z); - return res; -} - -static void zp_add(element_ptr n, element_ptr a, element_ptr b) { - /* - mpz_add(n->data, a->data, b->data); - mpz_mod(n->data, n->data, n->field->order); - */ - //This seems faster: - mpz_add(n->data, a->data, b->data); - if (mpz_cmp(n->data, n->field->order) >= 0) { - mpz_sub(n->data, n->data, n->field->order); - } -} - -static void zp_sub(element_ptr n, element_ptr a, element_ptr b) { - //mpz_sub(n->data, a->data, b->data); - //mpz_mod(n->data, n->data, n->field->order); - mpz_sub(n->data, a->data, b->data); - if (mpz_sgn((mpz_ptr) n->data) < 0) { - mpz_add(n->data, n->data, n->field->order); - } -} - -static void zp_square(element_ptr c, element_ptr a) { - /* - mpz_mul(c->data, a->data, a->data); - mpz_mod(c->data, c->data, c->field->order); - */ - mpz_powm_ui(c->data, a->data, 2, c->field->order); - - /* - const mpz_ptr prime = c->field->order; - const size_t t = prime->_mp_size; - const mpz_ptr p = a->data; - const mpz_ptr r = c->data; - mp_limb_t tmp[2 * t]; - mp_limb_t qp[t + 1]; - - mpn_mul_n(tmp, p->_mp_d, p->_mp_d, t); - - mpn_tdiv_qr(qp, r->_mp_d, 0, tmp, 2 * t, prime->_mp_d, t); - */ -} - -static void zp_double(element_ptr n, element_ptr a) { - //mpz_add(n->data, a->data, a->data); - mpz_mul_2exp(n->data, a->data, 1); - if (mpz_cmp(n->data, n->field->order) >= 0) { - mpz_sub(n->data, n->data, n->field->order); - } -} - -static void zp_halve(element_ptr n, element_ptr a) { - mpz_ptr z = a->data; - if (mpz_odd_p(z)) { - mpz_add(n->data, z, a->field->order); - mpz_tdiv_q_2exp(n->data, n->data, 1); - } else { - mpz_tdiv_q_2exp(n->data, a->data, 1); - } -} - -static void zp_mul(element_ptr n, element_ptr a, element_ptr b) { - mpz_mul(n->data, a->data, b->data); - mpz_mod(n->data, n->data, n->field->order); -} - -static void zp_mul_mpz(element_ptr n, element_ptr a, mpz_ptr z) { - mpz_mul(n->data, a->data, z); - mpz_mod(n->data, n->data, n->field->order); -} - -static void zp_mul_si(element_ptr n, element_ptr a, signed long int z) { - mpz_mul_si(n->data, a->data, z); - mpz_mod(n->data, n->data, n->field->order); -} - -static void zp_pow_mpz(element_ptr n, element_ptr a, mpz_ptr z) { - mpz_powm(n->data, a->data, z, n->field->order); -} - -static void zp_set(element_ptr n, element_ptr a) { - mpz_set(n->data, a->data); -} - -static void zp_neg(element_ptr n, element_ptr a) { - if (mpz_is0(a->data)) { - mpz_set_ui(n->data, 0); - } else { - mpz_sub(n->data, n->field->order, a->data); - } -} - -static void zp_invert(element_ptr n, element_ptr a) { - mpz_invert(n->data, a->data, n->field->order); -} - -static void zp_random(element_ptr n) { - pbc_mpz_random(n->data, n->field->order); -} - -static void zp_from_hash(element_ptr n, void *data, int len) { - pbc_mpz_from_hash(n->data, n->field->order, data, len); -} - -static int zp_is1(element_ptr n) { - return !mpz_cmp_ui((mpz_ptr) n->data, 1); -} - -static int zp_is0(element_ptr n) { - return mpz_is0(n->data); -} - -static int zp_cmp(element_ptr a, element_ptr b) { - return mpz_cmp((mpz_ptr) a->data, (mpz_ptr) b->data); -} - -static int zp_is_sqr(element_ptr a) { - //0 is a square - if (mpz_is0(a->data)) return 1; - return mpz_legendre(a->data, a->field->order) == 1; -} - -static void zp_field_clear(field_t f) { - UNUSED_VAR(f); -} - -static int zp_to_bytes(unsigned char *data, element_t e) { - int n; - - n = e->field->fixed_length_in_bytes; - - pbc_mpz_out_raw_n(data, n, e->data); - return n; -} - -static int zp_from_bytes(element_t e, unsigned char *data) { - mpz_ptr z = e->data; - int n; - n = e->field->fixed_length_in_bytes; - mpz_import(z, n, 1, 1, 1, 0, data); - return n; -} - -static void zp_to_mpz(mpz_ptr z, element_ptr a) { - mpz_set(z, a->data); -} - -static void zp_out_info(FILE * out, field_ptr f) { - element_fprintf(out, "GF(%Zd), GMP wrapped", f->order); -} - -void field_init_naive_fp(field_ptr f, mpz_t prime) { - field_init(f); - f->init = zp_init; - f->clear = zp_clear; - f->set_si = zp_set_si; - f->set_mpz = zp_set_mpz; - f->out_str = zp_out_str; - f->snprint = zp_snprint; - f->set_str = zp_set_str; - f->sign = mpz_odd_p(prime) ? zp_sgn_odd : zp_sgn_even; - f->add = zp_add; - f->sub = zp_sub; - f->set = zp_set; - f->square = zp_square; - f->doub = zp_double; - f->halve = zp_halve; - f->mul = zp_mul; - f->mul_mpz = zp_mul_mpz; - f->mul_si = zp_mul_si; - f->pow_mpz = zp_pow_mpz; - f->neg = zp_neg; - f->cmp = zp_cmp; - f->invert = zp_invert; - f->random = zp_random; - f->from_hash = zp_from_hash; - f->is1 = zp_is1; - f->is0 = zp_is0; - f->set0 = zp_set0; - f->set1 = zp_set1; - f->is_sqr = zp_is_sqr; - f->sqrt = element_tonelli; - f->field_clear = zp_field_clear; - f->to_bytes = zp_to_bytes; - f->from_bytes = zp_from_bytes; - f->to_mpz = zp_to_mpz; - - f->out_info = zp_out_info; - - mpz_set(f->order, prime); - f->data = NULL; - f->fixed_length_in_bytes = (mpz_sizeinbase(prime, 2) + 7) / 8; -} |